JPH02276656A - Dot printer - Google Patents

Abstract

PURPOSE:To perform equivalent printing to that by 24 pin print head with 12 pin print head by printing a 24 dot character while separating the 24 dot character into first and second 12 dot characters. CONSTITUTION:A dot printer D comprises a 12 pin print head 1, a first print means 2 for printing first 12 dots of a 24 dot character, and a second print means 3 for printing the remaining 12 dots. The first print means 2 has such function as to print odd dots of original pattern in first printing operation while the second print means 3 has such function as to print even dots of the original pattern in second printing operation. The first and second print means are realized through a program in a CPU which controls driving of the dot printer D. By such arrangement, a 24 dot character can be printed by means of a 12 dot print head.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dot-type printing device, and more particularly to a dot-type printing device that can perform printing equivalent to a 24-pin printhead with a 12-pin printhead.

[Prior Art] Conventionally, when printing characters with 12 vertical dots, a dot-type printing device equipped with a 12-pin head was used, and when printing characters with 24 vertical dots, a dot-type printing device with a 24-pin head was used. Printing was performed using a printing device.

[Problems to be Solved by the Invention] By the way, the above-mentioned 12-dot characters have rougher density and inferior print quality compared to 24-dot characters, so a 24-pin print head is used to obtain high quality prints. However, this dot type printing device has a disadvantage that it is difficult to downsize and reduce the price because the print head has 24 pins compared to one using a 12-pin print head.

Therefore, an object of the present invention is to enable printing with higher quality than 12-dot characters by using a 12-pin print head without using a 24-pin print head.

[Means for Solving the Problems] The technical means of the present invention for solving such problems is to print 12 dots out of 24 dots in a dot type printing device having a 12-pin print head. The apparatus is equipped with a first printing means and a second printing means for printing the remaining 12 dots, and is configured to print characters equivalent to a 24-pin print head.

[Embodiment] Hereinafter, a dot type printing device according to an embodiment of the present invention will be described based on the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of a dot type printing device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the printing procedure of this dot type printing device. FIG. 3 shows the original pattern, FIG. 4 shows the first printing pattern, FIG. 5 shows the second printing pattern, and FIG. 6 shows the final printing result.

As shown in FIG. 1, the dot type printing device according to the embodiment has a 12-pin print head 1, a first printing means for printing 12 dots out of a 24-dot character, and 2
and a second printing means 3 for printing the remaining 12 dots. The first printing means 2 has a function of printing odd-numbered dots of the original pattern shown in FIG. 3 in the first printing,
The second printing means 3 has a function of printing even numbered dots of the original pattern shown in FIG. 3 in the second printing. The first and second printing means are realized by a program of, for example, a CPU of a drive control section (not shown) that drives and controls the dot printing device.

As a result, characters of 24 dots can be printed, which is equivalent to a 24-pin print head as shown in FIG.

Hereinafter, the operation of the dot type printing device according to the embodiment will be explained according to the flowchart shown in FIG.

First, data editing is performed in the drive control section (second
(■ in Figure 2), it is checked whether data for one line of printing is ready (■ in Figure 2), and printing is started. For printing, first, an odd number dot pattern is printed (Fig. 2). In this case, as shown in FIG. 4, the print head 1 is driven so that the 12th pin is located at the odd-numbered dot portions (1, 3, 5, 7-23), Print.

Next, a one-dot line feed is performed (■ in Figure 2).

As a result, the print head 1 is driven so that the 12th pin is located at the even-numbered dot portions (2, 4, 6, 8, -24).

After that, even number dot pattern printing is performed (Fig. 2
). In this case, as shown in FIG. 5, even-numbered dot portions (white circles) are printed by the print head 1. This results in
Printing of one line is completed. As a result, as shown in Figure 6, by printing the odd numbered dots and the even numbered dots,
A 24-dot character equivalent to that printed with a 24-pin print head will be printed. That is, when the original pattern shown in FIG. 3 is printed by the 12-pin print head 1, odd-numbered dots of the original pattern are printed as shown in FIG. 4 in the first printing.

Next, a line break is made by one dot, and in the second printing, even numbered dots of the original pattern are printed as shown in FIG. As a result, the 6th
The original pattern can be printed as shown in the figure. In FIG. 6, the dots in black circles are the dots printed in the first printing, and the dots in white circles are the dots printed in the second printing.

When printing for one line is completed, the next line is entered (■ in Figure 2), and the presence or absence of print data on that line is checked (■ in Figure 2). If there is print data, printing is performed in the same manner as described above. In this way, the above printing operation is repeated in the batting order. Furthermore, if there is no print data, printing ends.

[Effects of the Invention] As explained above, according to the dot type printing device of the present invention, by printing twice with the 12-pin print head,
It can print characters with the same print quality as a 24-pin print head, and it can print high-quality characters with a 12-pin print head. Therefore, there is no need to use a 24-pin print head, and the print head is made smaller with 12 pins, making it possible to roughly reduce the number of hardware parts that drive the print head, making it easier to downsize the device. This has the effect of making it possible to lower the price.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a dot-type printing device according to an embodiment of the present invention, FIG. 2 is a flowchart showing a printing procedure of the dot-type printing device according to an embodiment, and FIG. 3 is a diagram showing an original pattern. , Figure 4 is a diagram showing the first printing pattern, Figure 5 is a diagram showing the first printing pattern.
The figure shows the second printing pattern, and FIG. 6 shows the final printing result.

Claims (1)

[Claims] A dot type printing device having a 12-pin print head, which includes a first printing means for printing 12 dots of the 24-dot character, and a second printing means for printing the remaining 12 dots, and the 24-pin print head and A dot-type printing device that prints equivalent characters.